<template>
  <div class="container">
    <button @click="initChart">初始化</button>
    <div class="wrap">
      <mpvue-echarts lazyLoad :echarts="echarts" :onInit="handleInit" ref="echarts" />
    </div>
  </div>
</template>

<script>
import * as echarts from 'echarts/dist/echarts.simple.min'
import mpvueEcharts from 'mpvue-echarts'

let chart = null

export default {
  data () {
    return {
      option: null,
      echarts
    }
  },

  components: {
    mpvueEcharts
  },

  methods: {
    initChart () {
      this.option = {
        color: ['#37a2da', '#32c5e9', '#67e0e3'],
        tooltip: {
          trigger: 'axis',
          axisPointer: { // 坐标轴指示器，坐标轴触发有效
            type: 'shadow' // 默认为直线，可选为：'line' | 'shadow'
          }
        },
        legend: {
          data: ['热度', '正面', '负面']
        },
        grid: {
          left: 20,
          right: 20,
          bottom: 15,
          top: 40,
          containLabel: true
        },
        xAxis: [
          {
            type: 'value',
            axisLine: {
              lineStyle: {
                color: '#999'
              }
            },
            axisLabel: {
              color: '#666'
            }
          }
        ],
        yAxis: [
          {
            type: 'category',
            axisTick: { show: false },
            data: ['汽车之家', '今日头条', '百度贴吧', '一点资讯', '微信', '微博', '知乎'],
            axisLine: {
              lineStyle: {
                color: '#999'
              }
            },
            axisLabel: {
              color: '#666'
            }
          }
        ],
        series: [
          {
            name: '热度',
            type: 'bar',
            label: {
              normal: {
                show: true,
                position: 'inside'
              }
            },
            data: [300, 270, 340, 344, 300, 320, 310],
            itemStyle: {
              emphasis: {
                color: '#37a2da'
              }
            }
          },
          {
            name: '正面',
            type: 'bar',
            stack: '总量',
            label: {
              normal: {
                show: true
              }
            },
            data: [120, 102, 141, 174, 190, 250, 220],
            itemStyle: {
              emphasis: {
                color: '#32c5e9'
              }
            }
          },
          {
            name: '负面',
            type: 'bar',
            stack: '总量',
            label: {
              normal: {
                show: true,
                position: 'left'
              }
            },
            data: [-20, -32, -21, -34, -90, -130, -110],
            itemStyle: {
              emphasis: {
                color: '#67e0e3'
              }
            }
          }
        ]
      }
      this.$refs.echarts.init()
    },
    handleInit (canvas, width, height) {
      chart = echarts.init(canvas, null, {
        width: width,
        height: height
      })
      canvas.setChart(chart)
      chart.setOption(this.option)
      return chart
    }
  },

  onShareAppMessage () {}
}
</script>

<style scoped>
.wrap {
  width: 100%;
  height: 300px;
}
</style>
